Animation conflict in game engine
I tried your file in BGE and UPBGE.
The bug still persists in BGE but seems completely fixed in UPBGE.
Commit Proof
https://github.com/UPBGE/upbge/commit/d05cb9bca5654a621a9daf7547fa031ab467ef85
https://github.com/UPBGE/upbge/commit/bd8f4cc4d6de396c902ee47261baba11bdd8f0a1